Help me figure out this part of my Halloween costume and I'll love you forever!

[lindseythefork.livejournal.com]

So, for Halloween, I think I'm going to go as.. 

What's that?  It's Pat!  Who's he?  Or she..?  Anyway!  My question is:  What is going to work best for the padding I'm going to need to make me look androgynous?  I'm thinking maybe some batting, but I don't want to have a heat stroke by the end of the night, since I'll be indoors.  Maybe build some air vents into the pants and shirt?  Or just suck it up for the sake of the costume?  Aaaand does anyone know the full lyrics to the Pat theme song?  I'm thinking I'm going to have to sit through the Pat movie.  I hope it's not as bad as I think it is.  Anyway!  Someone help me pleeeeeease..  *insert Pat laugh here*